jonasfj

// Copyright 2021 Google LLC.
// SPDX-License-Identifier: Apache-2.0

import 'dart:math';

double entropy(String s) {
  final length = s.length.toDouble();
  
  // TODO: Explore if this could be done faster without any allocations, since strings are often short.
  final frequencies = <int, int>{};

jonasfj

// Copyright 2020 Google LLC.
// SPDX-License-Identifier: Apache-2.0

import 'dart:async';
import 'dart:io';

Future<void> main() async {
  var count = 0;
  ProcessSignal.sigint.watch().forEach((s) {
    count++;

jonasfj

Query pubspec.yaml for all packages

When considering introduction of a new field in pubspec.yaml, or wondering how many packages use a certain feature, it can be useful to query all pubspecs from pub.dev. The following notes have some scripts to make this easy.

File yaml2json.sh

Helper script to convert YAML to JSON.

jonasfj

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

import 'dart:async' show FutureOr;
import 'dart:async';
import 'dart:convert' show utf8, json;
import 'dart:io' show Directory, Process, IOException, File;
import 'package:http/http.dart' as http;
import 'package:retry/retry.dart' show retry;
import 'package:pool/pool.dart' show Pool;

jonasfj

Two simple test files for dart.io.

1. Run dart download.dart
2. Run dart extract.dart

Have fun..

jonasfj

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0
//
// Experiments with dart, grpc and googleapis
// ==========================================
//
// 1. Install `protoc`
// 2. `pub global activate protoc_plugin`
// 3. `git clone https://github.com/googleapis/googleapis`
// 4. `protoc --dart_out=grpc:lib/src/generated -I googleapis/ -I /usr/local/include/ googleapis/google/cloud/vision/v1/image_annotator.proto`

jonasfj

import requests
from relengapi.lib.permissions import p

def scope_satisfied(req, scopes):
    """
    Returns true, if scopes satisfies req
    """
    return any((
      s == req or (s.endswith('*') and req.startswith(s[:-1])) for s in scopes
    ))

jonasfj

Decent links:
 * https://github.com/drduh/YubiKey-Guide
 * https://blog.josefsson.org/2014/06/23/offline-gnupg-master-key-and-subkeys-on-yubikey-neo-smartcard/
 * http://stafwag.github.io/blog/blog/2015/06/16/using-yubikey-neo-as-gpg-smartcard-for-ssh-authentication/
 * Or just google for gpg, yubikey, ssh, there is a lot of guides.


## The GPG setup

jonasfj

#!/bin/bash

# This script expects AWS credentials:
#   SIGNIN_AWS_ACCESS_KEY_ID
#   SIGNIN_AWS_SECRET_ACCESS_KEY
# And optionally the TOTP entry name in your yubikey
#   SIGNIN_AWS_YUBIKEY_OATH_NAME
# Put these environment variables into your .bashrc.local (or .bashrc, if you
# don't sync dot-files). In your .bashrc you'll also want:
#   alias signin-aws='eval `signin-aws`'

jonasfj

Example Configuration for tc-worker with script-engine

Example task: https://tools.taskcluster.net/groups/FxNyHL2oRnWBFzWUdqIkGQ/tasks/FxNyHL2oRnWBFzWUdqIkGQ/details

This works with any clientId/accessToken that has the scope: assume:project:autophone:custom-worker-scopes Notice, that you can take the scopes from that role and make them more specific, so workers have fewer permissions.